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CaptionSpark
Live captions and Spanish translation for browser audio
Browser audio is hard to follow when you cannot listen clearly. CaptionSpark turns the active tab into a live caption overlay for videos, calls, streams and X Spaces. Keep reading without leaving the page, follow transcript context, and optionally translate captions to Spanish. Includes 5 free caption minutes, then simple prepaid minutes.
I shipped CaptionSpark because I kept running into the same small problem: a tab is playing something useful, but listening is inconvenient.
It might be a video, a stream, a call, or a Space. I wanted a button that turns browser audio into readable text without sending me into a separate app.
The first version is intentionally narrow:
1. Start captions from the extension
2. Keep the text over the current page
3. Support Spanish translation
4. Do not store audio
The product is paid after a short trial because transcription costs money. I am trying to keep that part simple and transparent instead of hiding it behind a vague subscription.
Feedback welcome, especially on caption quality, overlay design and onboarding.
About CaptionSpark on Product Hunt
“Live captions and Spanish translation for browser audio”
CaptionSpark was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #105 on the daily leaderboard. Browser audio is hard to follow when you cannot listen clearly. CaptionSpark turns the active tab into a live caption overlay for videos, calls, streams and X Spaces. Keep reading without leaving the page, follow transcript context, and optionally translate captions to Spanish. Includes 5 free caption minutes, then simple prepaid minutes.
On the analytics side, CaptionSpark competes within Chrome Extensions, Productivity and Artificial Intelligence — topics that collectively have 1.2M followers on Product Hunt. The dashboard above tracks how CaptionSpark performed against the three products that launched closest to it on the same day.
Who hunted CaptionSpark?
CaptionSpark was hunted by German Burgardt. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of CaptionSpark including community comment highlights and product details, visit the product overview.
German Burgardt